IUPAC name of the compound is \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}-\underset{C{{H}_{3}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,\underset{C{{H}_{2}}\,\,C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C-C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,\,\,}}\,}}\,}}\,}}\,\] [NCERT 1982; MP PET 1994]

• A. 3, 4-dimethyl-3-n-propyl nonane
• B. 5, 7-dimethyl-7-n-propyl nonane
• C. 4, 5-dimethyl-4-ethyl decane
• D. 6, 7-dimethyl-7-ethyl decane